CN218750448U - Headrest adjusting mechanism, seat and vehicle with headrest adjusting mechanism and seat - Google Patents

Abstract

The utility model discloses a headrest adjustment mechanism, seat and vehicle that has it, headrest adjustment mechanism includes: the guide sleeve is suitable for being arranged on the seat; the supporting rod penetrates through the guide sleeve along the up-down direction, the positions of the guide sleeve and the supporting rod along the up-down direction are adjustable, and a first locking structure is arranged between the supporting rod and the guide sleeve; the upper base and the lower base are connected through a connecting rod, the positions of the upper base and the lower base are adjustable along the front-back direction, and a second locking structure is arranged between the upper base and the lower base; and the unlocking structure is arranged on the upper base and the supporting rod and is matched with the first locking structure and the second locking structure so as to enable the guide sleeve and the supporting rod to be disengaged and the upper base and the lower base to be disengaged. According to the utility model discloses a headrest adjustment mechanism can realize that the headrest is adjustable in front and back direction and upper and lower side, has reduced the operation complexity, and simple structure has reduced the assembly degree of difficulty, has reduced assembly cost.

Description

Headrest adjusting mechanism, seat and vehicle with headrest adjusting mechanism and seat

Technical Field

The utility model belongs to the technical field of the vehicle technique and specifically relates to a headrest adjustment mechanism, seat and have its vehicle is related to.

Background

In order to better meet the use requirements of passengers, various headrest adjusting mechanisms are developed on the market, which are mainly divided into two types: one is that the front and back adjusting mechanism is installed in the headrest, and the up and down adjusting mechanism is installed on the backrest guide sleeve, so the operation is inconvenient, and the two parts are required to be unlocked; the other is that the front-back adjusting mechanism and the up-down adjusting mechanism are integrated in the central core of the headrest, so that the assembly is complex and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a headrest adjustment mechanism, headrest adjustment mechanism can realize the headrest in front and back direction and upper and lower ascending adjustable of side, has reduced the operation complexity, has assembled the degree of difficulty and assembly cost.

The utility model discloses still provide a seat, the seat includes foretell headrest adjustment mechanism.

The utility model discloses still provide a vehicle, the vehicle includes foretell seat.

According to the utility model discloses headrest adjustment mechanism includes: the guide sleeve is suitable for being arranged on the seat; the supporting rod penetrates through the guide sleeve along the vertical direction, the positions of the guide sleeve and the supporting rod along the vertical direction are adjustable, and a first locking structure is arranged between the supporting rod and the guide sleeve; the upper base is connected with the lower base through a connecting rod, the positions of the upper base and the lower base are adjustable along the front-back direction, and a second locking structure is arranged between the upper base and the lower base; and the unlocking structure is arranged on the upper base and the supporting rod and matched with the first locking structure and the second locking structure so as to enable the guide sleeve to be disengaged from the supporting rod and enable the upper base to be disengaged from the lower base.

According to the utility model discloses headrest adjustment mechanism through setting up unlocking structure and first locking structure and second locking structure cooperation in order to remove cooperation and top base and lower base contact cooperation with uide bushing and bracing piece, can realize that the headrest is adjustable in front and back direction and upper and lower side, has reduced the operation complexity, and simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing and bracing piece with headrest adjustment mechanism by traditional two formulas change single formula into, improved the design degree of freedom of headrest, make the headrest have more the degree of identification.

In addition, according to the utility model discloses a headrest adjustment mechanism can also have following additional technical characterstic:

in some embodiments, the guide sleeve has a plurality of insertion holes spaced apart from each other in an up-down direction, the support rod has an avoidance hole adapted to be engaged with the plurality of insertion holes, and the first locking structure includes: the locking bolt is suitable for being inserted into the avoiding hole and one of the inserting holes, and the unlocking structure is connected with the locking bolt and used for driving the locking bolt to be separated from the inserting holes.

In some embodiments, the first locking structure further comprises: the fixed support is arranged in the supporting rod, and the locking bolt is movably arranged on the fixed support; the first elastic piece is arranged on the fixed support and connected with the locking bolt to drive the locking bolt to move towards the jack.

In some embodiments, the lower base has a plurality of locking grooves spaced apart in a front-to-rear direction, and the second locking structure includes: the locking pressure head, the rotatable locating of locking pressure head on the upper base, the one end of locking pressure head have with locking groove complex trip, the unblock structure with the locking pressure head cooperation is used for the drive the locking pressure head rotates so that the trip is followed the locking inslot breaks away from.

In some embodiments, the second locking structure further comprises: the second elastic piece is arranged on the upper base and connected with the locking pressure head to drive the clamping hook to be matched with the locking groove.

In some embodiments, the unlocking structure comprises: the sleeve is movably arranged on the upper base along the left-right direction; the unlocking push rod is connected with the sleeve and used for pushing the sleeve to move, and the unlocking push rod is matched with the locking pressure head; the dwang, the rotatable locating of dwang in the bracing piece, the one end of dwang is inserted and is located in the sleeve, be used for with sleeve synchronous movement, the other end of dwang with locking bolt connection unblock push rod promotes when the sleeve removes, the uide bushing with the bracing piece remove the cooperation and the top base with the cooperation is removed to the base down.

In some embodiments, a lower surface of the unlocking push rod has a fitting slope that is fitted with the second locking structure, the fitting slope being inclined upward in a moving direction of the unlocking push rod when the upper base and the lower base are disengaged.

In some embodiments, a reinforcing metal plate is arranged outside the guide sleeve.

The utility model also provides a seat that has above-mentioned embodiment.

According to the utility model discloses seat, through being equipped with foretell headrest adjustment mechanism, through setting up unlocking structure and first locking structure and second locking structure cooperation in order to remove cooperation and top base and lower base contact cooperation with uide bushing and bracing piece, can realize that the headrest is adjustable in front and back direction and upper and lower side, reduced the operation complexity, simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing and bracing piece with headrest adjustment mechanism by traditional two formulas change single formula, improved the design degree of freedom of headrest, make the headrest have more the degree of identification.

The utility model also provides a vehicle that has above-mentioned embodiment.

According to the utility model discloses the vehicle provides and is equipped with foretell seat, through setting up unlocking structure and first locking structure and second locking structure cooperation in order to remove cooperation and top base and lower base contact cooperation with uide bushing and bracing piece, can realize that the headrest is in the front and back direction and the ascending adjustable of upper and lower side, has reduced the operation complexity, and simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing and bracing piece with headrest adjustment mechanism by traditional two formulas change single formula, improved the design degree of freedom of headrest, make the headrest have more the degree of identification.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a headrest adjustment mechanism according to an embodiment of the present invention;

fig. 2 is a perspective view of the sleeve, the unlocking push rod and the upper base of the headrest adjusting mechanism according to the embodiment of the present invention;

fig. 3 is a perspective view of the engagement of the sleeve, the unlocking push rod, the upper base and the locking ram of the headrest adjusting mechanism according to the embodiment of the present invention;

fig. 4 is a perspective view of the sleeve, the unlocking push rod, the upper base and the lower base of the headrest adjusting mechanism according to the embodiment of the present invention;

fig. 5 is a perspective view of the guide sleeve, the support rod, the rotating rod and the reinforcing metal plate of the headrest adjusting mechanism according to the embodiment of the present invention;

fig. 6 is a perspective view of a headrest adjustment mechanism according to an embodiment of the present invention;

fig. 7 is a side view of the upper and lower bases of the headrest adjusting mechanism in accordance with an embodiment of the present invention, wherein the locking ram is engaged with the locking groove at a first gear;

fig. 8 is a side view of the upper and lower bases of the headrest adjusting mechanism in accordance with an embodiment of the present invention, wherein the locking ram is engaged with the locking groove at a second gear;

fig. 9 is a side view of the upper and lower bases of the headrest adjusting mechanism in cooperation with a locking ram engaged with a locking groove in a third gear position in accordance with an embodiment of the present invention;

fig. 10 is a side view of the upper and lower bases of the headrest adjusting mechanism in cooperation with a locking ram disengaged from a locking groove in accordance with an embodiment of the present invention;

fig. 11 is a schematic structural view of a headrest adjusting mechanism according to an embodiment of the present invention, wherein a locking latch is engaged with a receptacle;

fig. 12 is a schematic structural view of a headrest adjusting mechanism according to an embodiment of the present invention, wherein the locking latch is disengaged from the receptacle;

fig. 13 is a side view of a headrest adjustment mechanism, in accordance with an embodiment of the present invention, wherein the locking bolt is engaged with the receptacle in a first gear position;

fig. 14 is a side view of a headrest adjustment mechanism, according to an embodiment of the invention, wherein the locking pin is engaged with the receptacle in the second gear position.

Reference numerals:

100. a headrest adjusting mechanism;

1. a guide sleeve; 11. a jack; 12. external reinforcing ribs;

2. a support bar;

3. an upper base;

4. a lower base; 41. a locking groove;

5. an unlocking structure; 51. a sleeve; 52. unlocking the push rod; 521. a mating bevel; 53. rotating the rod;

6. a first locking structure; 61. locking the bolt; 62. fixing a bracket; 63. a first elastic member;

7. a connecting rod; 71. a fastener;

8. a second locking structure; 81. locking the pressure head; 811. a hook is clamped; 82. a second elastic member;

9. and reinforcing the metal plate.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The headrest adjusting mechanism 100 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1, a headrest adjusting mechanism 100 according to an embodiment of the present invention includes a guide sleeve 1, a support rod 2, an upper base 3, a lower base 4, and an unlocking structure 5.

Specifically, as shown in fig. 5, the guide sleeve 1 is suitable for being arranged on a seat, the support rod 2 is used for supporting other components of the headrest adjusting mechanism 100 and fixing the headrest adjusting mechanism 100 on the seat, the support rod 2 penetrates through the guide sleeve 1 along the up-down direction, the guide sleeve 1 and the support rod 2 are adjustable along the up-down direction, a first locking structure 6 is arranged between the support rod 2 and the guide sleeve 1, the headrest adjusting mechanism 100 can be changed into a single-root type from two traditional types, the design freedom of the headrest is improved, and the headrest is made to have more identification degree.

Optionally, a plurality of inner reinforcing ribs spaced apart along the circumferential direction of the guide sleeve 1 are arranged on the inner circumferential wall of the guide sleeve 1, so that the contact area between the guide sleeve 1 and the support rod 2 can be reduced, friction generated by relative motion between the guide sleeve 1 and the support rod 2 is reduced, and relative motion between the guide sleeve 1 and the support rod 2 is facilitated.

Further, referring to fig. 4 and 7, the upper base 3 and the lower base 4 are used for fixing other components of the headrest adjusting mechanism 100, the upper base 3 and the lower base 4 are connected through a connecting rod 7, the connecting rod 7 is fixed to the upper base 3 and the lower base 4 through a fastener 71 at two ends in the vertical direction, the upper base 3 and the lower base 4 are adjustable in position in the front-back direction, and a second locking structure 8 is provided between the upper base 3 and the lower base 4. Alternatively, the fasteners 71 may be rivets, screws, or other fasteners 71, without limitation. In one particular example, and with reference to FIG. 1, the linkage 7 may be suitably deformed as needed to avoid other components and reduce the likelihood of friction.

Preferably, the upper base 3 and the lower base 4 are made of metal, so that the strength is high, and the safety performance of the headrest adjusting mechanism 100 can be improved.

Further, referring to fig. 6, the unlocking structure 5 is provided on the upper base 3 and the support rod 2 and cooperates with the first locking structure 6 and the second locking structure 8 for disengaging the guide sleeve 1 and the support rod 2 and disengaging the upper base 3 and the lower base 4, so that the headrest can be adjusted in the front-rear direction and the up-down direction, the operation complexity is reduced, and the simple structure reduces the assembly difficulty and the assembly cost.

According to the utility model discloses headrest adjustment mechanism 100 through setting up the cooperation of unblock structure 5 and first locking structure 6 and second locking structure 8 in order to remove cooperation and top base 3 and the cooperation of lower base 4 contact with uide bushing 1 and bracing piece 2, can realize that the headrest is adjustable in front and back direction and upper and lower side, has reduced the operation complexity, and simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing 1 and bracing piece 2 with headrest adjustment mechanism 100 change the singleton formula from traditional two formulas, improved the design degree of freedom of headrest, make the headrest have more the degree of discernment.

In some embodiments of the present invention, referring to fig. 13 and 14, the guide sleeve 1 has a plurality of insertion holes 11 spaced apart from each other in the up-down direction, the support rod 2 is provided with a avoiding hole adapted to cooperate with the plurality of insertion holes 11, the first locking structure 6 includes a locking bolt 61, and the locking bolt 61 is inserted into the avoiding hole and one of the insertion holes 11 to fix the headrest adjusting mechanism 100 in the up-down direction. Further, referring to fig. 11 and 12, the unlocking structure 5 is connected to the locking bolt 61, and is used for driving the locking bolt 61 to disengage from the insertion hole 11, so that the headrest is adjustable in the up-and-down direction. For example, the insertion holes 11 may be two, four, five, six, eight, or ten spaced in the up-down direction on the guide sleeve 1. In a specific example, referring to fig. 13, the guide sleeve 1 has five insertion holes 11 spaced in the up-down direction, and the lock latch 61 is engaged with one of the five insertion holes 11 to achieve five-gear adjustment.

In a further embodiment of the present invention, referring to fig. 1, the first locking structure 6 further comprises a fixing bracket 62 and a first elastic member 63. Referring to fig. 11 and 12, a fixing bracket 62 is disposed in the support rod 2, a locking bolt 61 is movably disposed on the fixing bracket 62, and a first elastic member 63 is disposed on the fixing bracket 62 and connected to the locking bolt 61 for driving the locking bolt 61 to move toward the insertion hole 11. It can be understood that when the locking bolt 61 moves towards a direction away from the fixing bracket 62, the first elastic member 63 drives the locking bolt 61 to move towards a direction close to the fixing bracket 62 by resilience, so that the adjustment in the up-down direction when the guide sleeve 1 is disengaged from the support rod 2 is realized, and the engagement of the guide sleeve 1 and the support rod 2 is automatically restored after the adjustment is completed.

In a further embodiment of the present invention, referring to fig. 4, the lower base 4 has a plurality of locking grooves 41 spaced apart along the front-back direction, the second locking structure 8 includes a locking pressure head 81, the locking pressure head 81 is rotatably disposed on the upper base 3, and one end of the locking pressure head 81 has a hook 811 engaged with the locking grooves 41 to fix the headrest adjusting mechanism 100 in the front-back direction. Further, referring to fig. 7 to 10, the unlocking structure 5 is engaged with the locking ram 81 for driving the locking ram 81 to rotate to disengage the hook 811 from the locking groove 41, so as to achieve the adjustment of the headrest in the front-rear direction. For example, the locking grooves 41 may be two, three, four, or five spaced apart in the front-rear direction on the lower base 4. In a specific example, referring to fig. 7, the lower base 4 has five locking grooves 41 spaced apart in the front-rear direction, and the hook 811 engages with one of the five locking grooves 41 to achieve five-gear adjustment.

In a further embodiment of the present invention, referring to fig. 1, the second locking structure 8 further includes a second elastic member 82, and the second elastic member 82 is disposed on the upper base 3 and connected to the locking pressure head 81 to drive the hook 811 to cooperate with the locking groove 41. It can be understood that when the hook 811 is moved in a direction away from the locking groove 41, the second elastic member 82 resiliently drives the hook 811 to move in a direction close to the locking groove 41, thereby achieving adjustability in the front-rear direction when the upper base 3 is disengaged from the lower base 4 and automatic restoration of engagement of the upper base 3 with the lower base 4 after completion of the adjustment.

In a further embodiment of the present invention, referring to fig. 1, the unlocking structure 5 includes a sleeve 51, an unlocking push rod 52 and a rotating rod 53. Specifically, referring to fig. 2, the sleeve 51 is movably disposed on the upper base 3 in the left-right direction, the unlocking push rod 52 is connected to the sleeve 51 for pushing the sleeve 51 to move, and referring to fig. 3 and 4, the unlocking push rod 52 cooperates with the locking ram 81 to drive the locking ram 81 to rotate so as to disengage the hook 811 from the locking groove 41. Further, referring to fig. 11 and 12, the rotating rod 53 is rotatably disposed in the support rod 2, one end of the rotating rod 53 is inserted into the sleeve 51 for moving synchronously with the sleeve 51, and the other end of the rotating rod 53 is connected to the locking bolt 61 for driving the locking bolt 61 to disengage from the insertion hole 11. When the unlocking push rod 52 pushes the sleeve 51 to move, the guide sleeve 1 and the support rod 2 are disengaged and the upper base 3 and the lower base 4 are disengaged, so that the headrest is adjustable in the up-down direction and the front-back direction.

In a still further embodiment of the present invention, referring to fig. 11, the lower surface of the unlocking push rod 52 has a fitting inclined surface 521 engaged with the second locking structure 8, and the fitting inclined surface 521 inclines upward along the moving direction of the unlocking push rod 52 when the upper base 3 and the lower base 4 are disengaged. It can be understood that when the unlocking push rod 52 moves towards the direction approaching the sleeve 51, the engagement inclined surface 521 drives the end of the locking ram 81 far away from the hook 811 to rotate downwards, so that the hook 811 rotates upwards to disengage from the locking groove 41, and the headrest is adjustable in the front-rear direction.

The utility model discloses an in some embodiments, it is shown with reference to figure 5, the outside of uide bushing 1 is equipped with strengthens panel beating 9, strengthens on panel beating 9 and uide bushing 1 together locate the seat, can play the additional strengthening to uide bushing 1 and bracing piece 2, improves headrest adjustment mechanism 100's structural strength.

Optionally, as shown in fig. 1, a plurality of outer reinforcing ribs 12 spaced apart from each other in the circumferential direction of the guide sleeve 1 are disposed on the outer circumferential wall of the guide sleeve 1, so that the contact area between the guide sleeve 1 and the reinforcing metal plate 9 can be reduced, and the assembly between the metal plate 9 and the guide sleeve 1 can be conveniently reinforced.

The utility model discloses still provide a seat that has the headrest adjustment mechanism 100 of above-mentioned embodiment.

According to the utility model discloses seat, through being equipped with foretell headrest adjustment mechanism 100, through setting up the cooperation of unblock structure 5 and first locking structure 6 and second locking structure 8 in order to remove cooperation and top base 3 and the cooperation of lower base 4 contact with uide bushing 1 and bracing piece 2, can realize that the headrest is adjustable in front and back direction and upper and lower side, reduced the operation complexity, simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing 1 and bracing piece 2 with headrest adjustment mechanism 100 change the singleton formula from traditional two formulas, improved the design degree of freedom of headrest, make the headrest have more the degree of discernment.

The utility model discloses still provide a vehicle of the seat that has above-mentioned embodiment.

According to the utility model discloses vehicle, through being equipped with foretell seat, through setting up the cooperation of unblock structure 5 and first locking structure 6 and second locking structure 8 in order to remove cooperation and top base 3 and the cooperation of lower base 4 contact with uide bushing 1 and bracing piece 2, can realize that the headrest is adjustable in front and back direction and upper and lower side, reduced the operation complexity, simple structure has reduced the assembly degree of difficulty, has reduced assembly cost. And, through being equipped with uide bushing 1 and bracing piece 2 with headrest adjustment mechanism 100 by traditional two formulas change single formula into, improved the design degree of freedom of headrest, make the headrest have more the degree of discernment.

Other configurations and operations of the headrest adjusting mechanism 100, the seat, and the vehicle according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A headrest adjusting mechanism, comprising:

the guide sleeve (1), the said guide sleeve (1) is suitable for locating on the seat;

the supporting rod (2) penetrates through the guide sleeve (1) along the vertical direction, the positions of the guide sleeve (1) and the supporting rod (2) along the vertical direction are adjustable, and a first locking structure (6) is arranged between the supporting rod (2) and the guide sleeve (1);

the device comprises an upper base (3) and a lower base (4), wherein the upper base (3) is connected with the lower base (4) through a connecting rod (7), the positions of the upper base (3) and the lower base (4) are adjustable along the front-back direction, and a second locking structure (8) is arranged between the upper base (3) and the lower base (4);

unlocking structure (5), unlocking structure (5) are located upper base (3) with on bracing piece (2) and with first locking structure (6) and second locking structure (8) cooperation is in order to be used for the messenger uide bushing (1) with bracing piece (2) decommissioning and messenger upper base (3) with lower base (4) decommissioning.

2. The headrest adjusting mechanism according to claim 1, wherein the guide sleeve (1) has a plurality of insertion holes (11) spaced apart from each other in an up-down direction, the support rod (2) is provided with an avoiding hole adapted to be engaged with the plurality of insertion holes (11), and the first locking structure (6) includes:

locking bolt (61), locking bolt (61) are inserted and are suitable for inserting and locate dodge hole and one of them in jack (11), unlock structure (5) with locking bolt (61) are connected, are used for the drive locking bolt (61) are followed break away from in jack (11).

3. The headrest adjusting mechanism according to claim 2, characterized in that the first locking structure (6) further comprises:

the fixing support (62) is arranged in the supporting rod (2), and the locking bolt (61) is movably arranged on the fixing support (62);

the first elastic piece (63) is arranged on the fixed support (62) and connected with the locking bolt (61) for driving the locking bolt (61) to move towards the jack (11).

4. The headrest adjusting mechanism according to claim 2, wherein the lower base (4) has a plurality of locking grooves (41) spaced apart in a front-rear direction thereon, and the second locking structure (8) includes:

locking pressure head (81), rotatable locating of locking pressure head (81) on upper base (3), the one end of locking pressure head (81) have with locking groove (41) complex trip (811), unblock structure (5) with locking pressure head (81) cooperation is used for the drive locking pressure head (81) rotate so that trip (811) are followed break away from in locking groove (41).

5. The headrest adjusting mechanism according to claim 4, characterized in that the second locking structure (8) further comprises:

the second elastic piece (82) is arranged on the upper base (3) and connected with the locking pressure head (81) to drive the clamping hook (811) to be matched with the locking groove (41).

6. Headrest adjusting mechanism according to claim 4, characterized in that the unlocking structure (5) comprises:

a sleeve (51), wherein the sleeve (51) is movably arranged on the upper base (3) along the left-right direction;

the unlocking push rod (52), the unlocking push rod (52) is connected with the sleeve (51) and used for pushing the sleeve (51) to move, and the unlocking push rod (52) is matched with the locking pressure head (81);

dwang (53), dwang (53) is rotatable locate in bracing piece (2), the one end of dwang (53) is inserted and is located in sleeve (51), be used for with sleeve (51) synchronous motion, the other end of dwang (53) with locking bolt (61) are connected unblock push rod (52) promote when sleeve (51) removes, uide bushing (1) with bracing piece (2) break up and top base (3) with lower base (4) break up.

7. The headrest adjusting mechanism according to claim 6, wherein a lower surface of the unlocking pushrod (52) has an engagement slope (521) that engages with the second locking structure (8), the engagement slope (521) being inclined upward in a moving direction of the unlocking pushrod (52) when the upper base (3) and the lower base (4) are disengaged.

8. Headrest adjusting mechanism according to claim 1, characterized in that a reinforcement sheet metal (9) is provided outside the guide sleeve (1).

9. A seat, characterized by comprising a headrest adjusting mechanism (100) according to any one of claims 1-8.

10. A vehicle characterized by comprising a seat according to claim 9.

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